Geometry Reasoning for Grades 4–8
Eight focused skills: classifying quadrilaterals, rectangle and triangle area, composite area, perimeter versus area, angle sums, volume and nets, and the Pythagorean theorem.
Browse the skills
Each card opens a parent-readable explanation plus a direct Numeris practice room.
Classifying Quadrilaterals
Four-sided shapes form a family, and the categories overlap: every square is also a rectangle, a rhombus, and a parallelogram.
Practice / Learn →Area of Rectangles & Triangles
Area is the space inside a shape, measured in square units.
Practice / Learn →Area of Composite Shapes
A composite shape is made of simpler shapes joined together (like an L-shape = two rectangles).
Practice / Learn →Perimeter vs Area
Perimeter is the distance around a shape (add up all the side lengths); area is the space inside (square units).
Practice / Learn →Same Perimeter, Different Area
Two shapes can have the same perimeter but very different areas.
Practice / Learn →Missing Angles & the Triangle Angle Sum
The three angles inside any triangle always add up to 180°.
Practice / Learn →Volume & Nets
Volume is the space inside a 3-D solid, measured in cubic units.
Practice / Learn →Right Triangles & the Pythagorean Theorem
In a right triangle (one 90° angle), the two short sides (legs) and the longest side (hypotenuse, opposite the right angle) are linked by the Pythagorean theorem: leg² + leg² = hypotenuse², or a² + b² = c².
Practice / Learn →Jump into the interactive rooms.
Use the app for free practice, or open a specific skill from any page.
Want a printable set too?
Get the free Reasonwell sample pack while the math workbook line is coming soon.
Download All three Grade 2 workbook samples ↓22 pages · 1.8 MB · No email required